Low Vitamin D Linked to Breast Cancer Risk

The results of studies indicate that sufficient endogenous vitamin D levels may have a protective function on mammary cells, reducing breast cancer risk. When vitamin D levels are reduced for a long period, the mammary cell physiology may be altered including local 1,25(OH)2D synthesis & the regulation of growth factors and other hormones. Perez-Lopez et al, Reprod Sci 2009 Jan; 16(1): 7-19.